/Engine/Source/Developer/ToolWidgets/Public/SWidgetDrawer.h
Dismisses an open drawer with an animation. The drawer contents are removed once the animation is complete
true if any open drawer was dismissed
bool DismissDrawer ( const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > & NewlyFocusedWidget )